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3 years ago

Help plz and teach me how to answer

Mathematics

2 answers:

professor190 [17]3 years ago

6 0

She subtracted on the right side, when she should've added.

The answer is B
"Helen should have added 17 to both sides of the equation."

alexdok [17]3 years ago

3 0

B. Helen should have added 17 to both sides of the equation.
When trying to solve an equation like that with a variable, you have to make sure both sides are even. Whatever you do to one side, you have to do to the other. So, if you add 17 to one side to cancel it out, you have to add 17 to the other side as well.

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A rhombus has sides of length x + 6 inches and a perimeter of 49 inches. Which equation represents this situation?

Jet001 [13]

Answer:

Step-by-step explanation:

6 0

2 years ago

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Can you help me solve this please

OLga [1]

Answer:

-22+27i

Step-by-step explanation:

$i = \sqrt{ - 1} \\ (3 - 4i)( - 6 + i) \\ = (3 - 4 \sqrt{ - 1} )( - 6 + \sqrt{ - 1} ) \\ = 3( - 6 + \sqrt{ - 1)} - 4 \sqrt{ - 1} ( - 6 + \sqrt{ - 1} ) \\ = - 18 + 3 \sqrt{ - 1} + 24 \sqrt{ - 1} - 4 \\ = - 22 + 27 \sqrt{ - 1} \\ putting \: \: \: \sqrt{ - 1 } = i \\ = - 22 + 27i$

Hope it helps.

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8 0

2 years ago

Use a net to find the lateral area and the total surface area of the cereal box.

ziro4ka [17]

To find the lateral area you will find the area of all 4 faces that are perpendicular to the base.

You will multiply the side by the length (front/back) and the side by the width (sides).

12 x 8 = 96
12 x 2 = 24
120 square inches x 2 = 240 square inches

The lateral area is 240 square inches.

The area of the base is 8 x 2 = 16 square inches.

16 x 2 = 32 square inches

240 square inches + 32 square inches = 272 square inches is the surface area.

7 0

3 years ago

Find parametric equations through point P=(2,2,7) in the direction of the vector v = (44, 14, -20)?

ycow [4]

9514 1404 393

Answer:

(x, y, z) = (2+44t, 2+14t, 7-20t)

Step-by-step explanation:

One way to write parametric equations for line L is ...

L = P + t·v

where P is the given point and v is the given direction vector. Using that form, we have ...

(x, y, z) = (2+44t, 2+14t, 7-20t)

If you like, you can remove a common factor of 2 from the coefficients of t.

(x, y, z) = (2+22t, 2+7t, 7-10t)

5 0

2 years ago

A projected image appears as an isosceles trapezoid.

Komok [63]

7x + 4 + 9x = 180
16x = 176
x = 11

9x = 9x11 = 99
7x + 4 = 7(11) + 4 = 77 + 4 = 81

in order to form a rectangular image, each angle needs to be equal 90 degreesn

99 - 9 = 90
81 + 9 = 90

answer

B. 9°

6 0

3 years ago

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